Javan Gibbon

Like all gibbon species, the silvery gibbon lives in pairs and stakes out territory that the pair strongly defends; it has relatively small territories of about 42 acres (17 hectares). Females sing to declare their territory several times a day, and if strangers are spotted, the male screams in an attempt to scare them away. The majority of the solo song bouts or scream bouts are produced by females. The female vocal bouts occur after 0500 hr, with the vocal bout activity peaking around 0600 hr. In contrast, the male vocal bouts primarily occurred before 0500 hr was created in the style of a chorus, with a minimum of three participants. There are choruses around every 8.5 days. It took place sooner and lasted longer than female solo song fights. The majority of male songs begin in the dark, between 0355 and 0440 hours. The males are usually very aggressive toward others.